linux-kernel - Re: [RFC PATCH 1/4] splice: Fix corruption of spliced data after splice() returns

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Message-ID: <12729.1690215357@warthog.procyon.org.uk>
Date:   Mon, 24 Jul 2023 17:15:57 +0100
From:   David Howells <dhowells@...hat.com>
To:     Miklos Szeredi <miklos@...redi.hu>
Cc:     dhowells@...hat.com,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Matthew Wilcox <willy@...radead.org>,
        Matt Whitlock <kernel@...twhitlock.name>,
        netdev@...r.kernel.org, Dave Chinner <david@...morbit.com>,
        Jens Axboe <axboe@...nel.dk>, linux-fsdevel@...ck.org,
        linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        Christoph Hellwig <hch@....de>, linux-fsdevel@...r.kernel.org
Subject: Re: [RFC PATCH 1/4] splice: Fix corruption of spliced data after splice() returns

Miklos Szeredi <miklos@...redi.hu> wrote:

> Both source and destination of copy_file_range() are regular files and

Ah - the check is in generic_file_rw_checks().  Okay, nevermind.  (Though it
looks like it might allow this to be used with procfiles and suchlike, but
anyone who tries that had probably better know what they're doing).

David